Furnace



(No Model.) F. B. GIESLBR.

I FURNACE. No. 526,524. Patented Sept. 25,1894.

IIIHHHIIII ll ii [I ll [1 ll 11 H! II II II ll 1! UNITED STATES PATENT OFFICE;

FRANKLIN B. GIESLER, or MILWAUKEE, Wisconsin.

FURNACE, V

SPECIFICATION forming part of Letters Patent No. 526,524, dated September 25, 1894,

Application filed October 9, 1893. Serial No. 487,625. (No model.)

To all whom it may concern:

Be it known that LFRANKLIN B. GIESLER, a citizen of the United States, and a resident V of Milwaukee, in the county of Milwaukee,

and in the State of Wisconsin, have invented certain new and useful Improvements in Furnaces; and I do hereby declare that the following is a full, clear, and exact description thereof.

Referring by letter to the drawings, A A represent parallel walls and B a grate supported by the same. The space between the walls above the grate constitutes the fire-box of my furnace and the space below said grate the ash-pit, these compartments being re-. spectively provided with suitable doors at either or both ends of said furnace. The grate-supporting Walls are inclosed within a preferably arch-like compartment 0 provided with a flue D that extends up into a main flue leading from another preferably arch-like compartment E, and fulcrumed to the latter flue is a lever F from which I hang a cover G for the former flue.

The main flue D is provided with a lateral branch H for pipeconnection with a maltingapparatus having an air-exhaust, as is common in the art.

The walls of the furnace are of any suitable :non-conducting material, and at the base of said furnace, passages I connect the inner and outer compartments 0, E, above specified. These compartments have upper and lower air-inlets and the latter are controlled by suitable doors J, K, at the front and rear of the furnace. Above the passages I and lower air-inlets, the outer compartment E is provided with suitable gratings each of the latter being preferably a series of parall'el'I-beams L set transversely in the longitudinal walls bounding said outer compartment. Each of the gratings just specified is for the support of a mass of fire-brick M or other suitable heat absorbing material.

The flue D being closed by its lever controlled cover G, air primarily admitted to the furnace through the ash-pit will be heated and escape out of the inner'compartment 0 through the passages I into the outer compartment E from whence it is drawn away through the flue D and its lateral branch. A certain amount of the heat is absorbed by the material M in the outer compartment 0 of the furnace, and if air be admitted through the lower inlets to said compartment it will be warmed by contact with said heated material.

If at any time it is desirable to check the heat, the upper air-inlets to the outer compartment of the furnace are opened, and whenever the greatest possible heat is needed the flue cover G is lifted to permit of direct draft from the fire'box.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. Afurnace comprising a fire-box and ashpit, a compartment inclosing the same, a flue leading from this compartment, a movable closure for the flue, another compartmentinclosing the one aforesaid and communicating with the lower portion of the same, a flue leading from the outer compartment and surrounding the former flue, upper and lower air-inlets to said outer compartment, suitable means for controlling the air-inlets, gratings in the aforesaid outer compartment above the lower air-inlets, and heat-absorbing material arranged on the gratings, substantially as set forth.

2. A furnace comprising a fire-box and ashpit, a compartment inclosing the same, a flue leading from this. compartment, another compartment inclosing the one aforesaid and communicating with the lower portion of the same, a flue leading from the outer compartment and surrounding the former flue, a lever fulcrumed to the outer flue, a cover for the inner flue hung from the lever, upper and lower air-inlets to said outer compartment, have hereunto set my hZLHCLfit Milwaukee, in suitable means for controlling the air-inlets, the county of Milwaukee ami State of Wiscongratings in theaforesaid outer compartment sin; in the presence of two witnesses. above the lower air-iniets, and heat absorbing 5 material arranged. on the gratings, s ubstam Witfiesses:

FRANKLIN B. GIESLER.

tially as set forth. I NQE OLIPHANT,

In testimony thatI claimthe foregoingI HENRY DAN-KERT. 

